Buttonbush vs Nodding Onion - TreeTime.ca

Buttonbush vs Nodding Onion

Cephalanthus occidentalis

Allium cernuum

CUSTOM GROW

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Buttonbush
Nodding Onion

Buttonbush is a moisture loving shrub that provides year round interest.

It has round, fragrant flowers resembling small buttons or pincushions. The flowers transform into small reddish-brown fruit that persists into winter while the leaves take on shades of red in fall.

Providing essential food to bees, butterflies, and other insects, this shrub is versatile. Try it in your next shrub border.

Nodding Onion is a native perennial wildflower known for its nodding clusters of flowers that range in color from white to pink to purple. The lightly scented blooms provide pollen and nectar for pollinators, especially bees, which can collect while hanging upside down, a capability most other insects lack.

The narrow, grass-like leaves of the Nodding Onion can be used as a seasoning in cooked dishes, though bulbs and raw leaves should not be eaten in large quantities. All parts of the plant have an onion-like aroma when bruised, which helps deter deer and rabbits. They can self-seed readily, so removing spent blooms helps manage their spread. Tolerant of a range of soils, including alkaline, it is well-suited for a variety of plantings, including pollinator gardens and naturalization projects.

Buttonbush Quick Facts

Nodding Onion Quick Facts

Zone: 4a
Zone: 3a
Height: 2.4 m (8 ft)
Height: 0.3 m (1.0 ft)
Spread: 1.5 m (5 ft)
Spread: 0.2 m (0.5 ft)
Light: any
Light: partial shade, full sun
Moisture: normal, wet
Moisture: dry, normal
Growth rate: medium
Growth rate: fast
Life span: long
Life span: short
Growth form: upright to spreading, clump-forming
Spreading: seeds - high
Suckering: low
Maintenance: medium
Maintenance: medium


Toxicity: raw leaves and bulbs can be midly toxic
Foliage: smells of onion when crushed, edible
Flowers: large, white, spherical
Flowers: white, pink, or purple nodding clusters
Bloom time: late spring to summer
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: ON, QC, NS, NB
Native to: AB, BC, SK, ON
Other Names: ladys leek, nodding wild onion